Toxicity of road salt to Nova Scotia amphibians
Toxicity of road salt to Nova Scotia amphibians
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DOI：
10.1016/j.envpol.2008.06.032
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发表时间：
2009-01-01
影响因子：
8.9
通讯作者：
Russell, Ronald W.
中科院分区：
文献类型：
--
作者：
Collins, Sara J.;Russell, Ronald W.
化学污染物从径流中沉积到路边湿地是当前的一个环境问题。在北纬地区，径流水中的一种主要污染物是用作除冰剂的盐(氯化钠)。在这项研究中，调查了26个路边池塘的两栖动物物种丰富度和氯离子浓度。用一系列对环境有影响的氯化钠浓度对五种当地常见的两栖动物进行了急性毒性试验(LC_(50))。现场调查表明，斑点火蜥蜴(Ambystoma Maculata)和林蛙(Rana Sylvatica)不占用高氯池。美洲蟾蜍(Bufo Americanus)没有基于氯离子浓度的池塘偏好。急性毒性测试表明，斑点火蜥蜴和林蛙对氯化物最敏感，美洲蟾蜍最不敏感。春季金龟子(伪十字花科)和青蛙(林蛙)表现出中等敏感性。我们的结论是，由于使用除冰盐，池塘中的氯离子浓度通过排除不耐盐物种而影响群落结构。(C)2008爱思唯尔有限公司。保留所有权利。
The deposition of chemical pollutants into roadside wetlands from runoff is a current environmental concern. In northern latitudes, a major pollutant in runoff water is salt (NaCl), used as de-icing agents. In this study, 26 roadside ponds were surveyed for amphibian species richness and chloride concentration. Acute toxicity tests (LC50) were performed on five locally common amphibian species using a range of environmentally significant NaCl concentrations. Field surveys indicated that spotted salamanders (Ambystoma maculatum) and wood frogs (Rana sylvatica) did not occupy high chloride ponds. American toads (Bufo americanus) showed no pond preference based on chloride concentration. Acute toxicity tests showed spotted salamanders and wood frogs were most sensitive to chloride, and American toads were the least. Spring peepers (Pseudacris crucifer) and green frogs (Rana clamitans) showed intermediate sensitivities. We concluded that chloride concentrations in ponds due to application of de-icing salts, influenced community structure by excluding salt intolerant species. (c) 2008 Elsevier Ltd. All rights reserved.